function search() {
    if (document.getElementById("k").value == "") {
        window.alert("搜索内容不可以为空!");
        document.getElementById("k").focus();
    }
    else {
        var posturl = "";
        switch (document.getElementById("sltType").value) {
            case "1":
                posturl = "/search.aspx?k=" + escape(document.getElementById("k").value);
                break;
            case "2":
                posturl = "/searchbuy.aspx?k=" + escape(document.getElementById("k").value);
                break;
            case "3":
                posturl = "/searchyp.aspx?k=" + escape(document.getElementById("k").value);
                break;
            case "4":
                posturl = "/searchnews.aspx?k=" + escape(document.getElementById("k").value);
                break;
            case "5":
                posturl = "http://book.qrx.cn/search.aspx?q=" + document.getElementById("k").value;
                break;
        }
        window.open(posturl, "_top");
    }
}

function kd(kc) 
 {
     if (kc == 13) {
         search();
    }
}